al_get_sample_instance_playing - Allegro 5 API

       Return true if the sample instance is in the playing state.  This may be true even if the instance is not
       attached to anything.

       al_get_sample_instance_playing - Allegro 5 API

al_set_sample_instance_playing(3alleg5)

Allegro reference manual                                                 al_get_sample_instance_playing(3alleg5)

              #include <allegro5/allegro_audio.h>

              bool al_get_sample_instance_playing(const ALLEGRO_SAMPLE_INSTANCE *spl)